Souces told Page Six that McIlroy, 25 — who rallied to beat Phil Mickelson by one stroke to take the top prize Sunday at the Valhalla Golf Club in Louisville, Ky. — hopped a plane straight to New York afterward and partied with about a dozen male friends, including his manager and chef.

“He was celebrating his win,” one source said. McIlroy and his group of pals teed off at 1Oak nightclub in Chelsea at 3:30 a.m. Monday, shortly after touching down. Hours later they were spotted at lunch at Lavo, followed by dinner at Bodega Negra in the Dream Downtown hotel for the venue’s Loco Mondays dinner party.

Flying high with the team after my 4th Major victory!!! NYC here we come!! Thanks for all the support and well wishes pic.twitter.com/zK1q8xnwA8

Next, they shuttled around the corner to Avenue on 10th Avenue, arriving around 1 a.m. to the very crowded club where DJ Reach spun hip-hop tunes.

Our spies said several bottles of booze were sent over to McIroy‘s table, which was right next to that of UFC fighter Georges St-Pierre. The golf champ tweeted a photo of himself and childhood pal Harry Diamond partying at the club: “[Harry] and I having a great time in Manhattan! Thanks @AvenueNY for hosting us!!” The crew was there until at least 2:30 a.m.

We’re told McIlroy appeared to have no interest in any women and stuck tight to his crew of male friends and associates. “It was all guys. No girls. Straight up,” a source said.

McIlroy in May dumped his fiancée, Danish tennis player Caroline Wozniacki, days after they sent out their wedding invitations. He said this month of being single: “I think it has happened to me for the better. I’ve put a little bit more time into my golf and refocused me in a way. It’s the only thing — not the only thing I have. I’ve got my family and my friends, but I just immersed myself in my game. I’ve practiced hard and I’ve done all the right things, and I’m reaping the rewards.”